Stone honing and polishing machine.



G. E. SHIPWAY. STONE HONING AND POLISHING MACHINE.

APPLICATION FILED DEC-18.1915.

Patented Oct. 24, 1916.

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G. E. SHIPWAY. STONE HONING AND POLISHING MACHINE.

APPLICATION FILED [1E(;- 18. 1915- Oct. 24,

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G. E. SHIPWAY.

STONE HONING AND POLISHING MACHINE.

MPLICATIO1I FILED DEC- 18, 1915. Patented Oct. 24:,

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GEORGE E. SHIPWAY, OF NEW ROCHELLE, NEW YORK.

STONE HONING AND POLISHING MACHINE.

Specification of Letters Patent.

Patented Oct. 24, 1916.

Application filed December 18, 1915. Serial No. 67,554.

To all whom it may concern Be itknown that I, GEORGE E. SHIPWAY, a citizen of the United States of America, residing at New Rochelle, New York, have invented a new and'useful Stone Honing and Polishing Machine, of which the following is a specification.

The general objects ofmy present invention. are to provide a simple and effective machine for honing and polishing moldings of stone, particularly marble.

Special objects are to secure a relatively rapid working of the stone and to produce work having clear, clean-cut lines.

Other objects are to enable the ready adaptation of the abrasive or cutting surfaces to the stone surfaces being worked upon, and to provide for the simultaneous working on sections of stone of different hardness.

In the accomplishment of these several objects I employ a stone supporting bed and an abrasive support, arranged for rela tive movement, one over the other, and mount these parts so that they may readily be adjusted to suit specific requirements.

' In a preferable embodiment of the invention, the stone is mounted on a relatively stationary, though adjustable, supporting bed and the abrasive is carried by a reciprocating carriage, said abrasive being in the form of sections which may be independently adjusted with respect to the stone being worked upon. a

Various other features of the invention and details of structure will appear as the specification proceeds, attention being directed to the accompanying drawings wherein I have illustrated a practical and preferred embodiment of the invention.

In these drawings: Figure 1 1s a view in' side elevation of a machine constructed in accordance with and embodying the invention. Fig. 2 is a top plan view of the same. Fig. 3 is an enlarged end elevation of the left hand end of the machine.

In the embodiment of the invention illustrated, the block or slab of stone indicated at 7 in Fig. 3 is mounted on a relatively sta-' tionary supporting bed 8, and the abrasive or cutting elements 9' are mounted for reciprocating movement above the stone supporting bed, being carried by the carriage consisting of the cross-heads 1O sliding in the guides 11. The cross-heads are secured together in parallel spaced relation by the connecting rod 22. The connection of this pitman to the carriage is efi'ected in the present instance, by engaging the end of the pitman with one of the cross-head bolts, the bolt 15 in this particular case. The crank wheel is driven by suitable power, and is shown herein as mounted on the end of a shaft 23 which derives its motion from a belt pulley 24, a suitable friction or other clutch 25 being provided for controlling the application of power.

The abrasive cutting elements are usually in the form of blocks having an abrasive cutting surface conforming to the outline of the shape to be produced on the stone. Thus, in Fig. 3, where a molding of convex outline is being produced the abrasive surface is in the form of a concave reverse mold of corresponding shape. The number and size of abrasive blocks employed will vary with the size of the machine and the size of the stone to be operated upon. The carriage in the machine illustrated is designed for the support of three abrasive cutting members, and these cutting members are so mounted that all or any number of them may be used at any time. This is provided for by supporting each block on a backing plate 27 hinged at 28 to an outstanding sup-' porting bracket 29 carried by the front cross-head. This mounting permits of the abrasive supporting backing plate 27 being hinged up out of the way when the abrasive carried thereby is not to be used. I

To hold the abrasive supporting plates down in operative position, clamping means are provided, consisting in the present illustration of clamp bars 30 pivoted on the, studs 31' and engaging with tracks 32 on top of the brackets at their inner ends and carrying clamp screws 83 at their outer ends for bearing on top of the supporting plates. With this arrangement it is possible to swing the clamp bars on their pivots so as to carry the clamping ends of the bars from above the abrasive Supporting plates, whereupon the supporting plate is free to be lifted. This condition is. represented by the center clamp in Fig. 1. The tracks 32 with which the inner ends of the clamp bars engage may, if desired, be in the form of cams.

The clamps may be locked in a holding position by means such as the springs 35 mounted on top of the abrasive supporting plates 27 and perforated as at 36 to receive the clamping screws. These locking springs may be beveled as indicated at 37 in Fig. 1, so that if the clamping screw is protruding whenthe clamping bar is swung into clamping position, the screw will ride up over the spring until it-passes into the opening 36 provided therefor.

In addition to the vertical adjustment provided for by the springs 35 and the clamp ing screws, the abrasive blocks are preferably made laterally adjustable as by supporting them incarrier blocks or holders 38 secured to the backing plate by the bolts 39 which are adjustable in the slots 40.

V The stone supporting bed is made adjustable with respect to the cutting elements by supporting it on screws 43 engaged by nuts 44, said nuts being operatively connected with worm gears 45 which are engaged by worms 46 on theshaft 47 said shaft having a hand wheel 48 at one end for operating the same. The nuts 44 have abearing in the supports 49, from all of which it will be evident that when the hand wheel 48 is turned the worms 46 will simultaneously rotate both worm gears 45 and the nuts 44 carried there by which, operating on the supporting screws, will simultaneously raise or lower both ends of the stone supporting bed. Provision is also preferably made for adjusting the work sidewise on the supporting bed, this being accomplished in the machine illustrated by mounting the stone in a trough 50 which rests on the supporting bed and can be shifted thereon by screws 51 engaged in bearing 52 011 the supporting bed and connected with brackets 53 carried by the trough, these screws having hand wheels 54 on their outer ends for operating the same, I

The operation will be clear from the fore going, it being apparent that by using the proper form of abrasive the marble or stone the individual cutting orpolishing elements, I

; and this serves to keep the work clean and facilitates the honing and polishing operations. By withdrawingthe-clamping screws the abrasive or polishing members will be held down only under the tension of the pensated for by adjusting the stone trough or the abrasive member itself laterally in one direction or another. The cross-heads are usually lubricated by suitable means such as the oil cups 55 illustrated applied to the upper portion of the cross-head guides.

lVhen operating on a long piece of stone all the abrasive or forming members will usually be employed. In operating on shorter pieces only one or two of the forming members may be used. It will be evident that by adjusting the tension on individual forming members, sections of stone of'varying hardness may be successfully operated upon.

It will be noted that in the machine illustrated, the abrasive supporting brackets 29 are located substantially in the planes of the bolts which secure the cross-heads in spaced relation so that said brackets are thereby braced by said securing means, and the cross-heads are protected from undue strain. I

What I claim is:

1; In a machine of the character described, a stone supporting bed and an abrasive sup. port adjustable toward and away from each other, means for imparting motion to one of said members to thereby cause the abrasive to workupon the stone carried by the stone support, and means for shifting the stone support and abrasive support bodily in a lateral direction with respect to each other to compensate for the wearing down of the abrasive.

. 2. In amachine of the character described, a stone supporting bed and an abrasive sup port adjustable toward and away from each other, means for imparting motion to one of said members to thereby cause the abrasive to work upon the stone carried by the stone support, means for shifting the stone support and .abrasives'upport laterally rela tively to each other to compensate for the wearing down of the abrasive, and means for applying a yielding or a positivepressure to the abrasive support whereby to hold the abrasive either yieldin-gly or positively engaged with the stone.

3. In a machine of the character described, a stone supporting bed, a reciprocating carriage, a hinged abrasive support carried by said carriage and movable on its hinge from a position above the stone support to a position free of said stone support and a clamp bar pivoted on said carriage and adapted to beswung into'clamping position above said hinged abrasive support.

4. In a machine of the character delot) scribed, a stone supporting bed, a reciprocating carriage, a hinged abrasive support carried by said carriage and movable on its hinge from a position above the stone support to a position free of said stone support, a clamp bar pivoted on said carriage and adapted to be swung into clamping position above said hinged abrasive support, and a clamping screw mounted in the end of said clamp bar and arranged to bear on top of the abrasive support.

5. In a machine of the character described, a stone supporting bed, a reciprocating carriage, a hinged abrasive support carried by said carriage and movable on its hinge from a position above the stone support to a position free of said stone support, a clamp bar pivoted on said carriage and adapted to be swung into clamping position above said hinged abrasive support, a clamping screw mounted in the end of said clamp bar and arranged to bear on top of the abrasive support, and a spring mounted on top of the hinged abrasive support arranged to bear against the underside of the clamp bar and provided with an opening to receive the clamp screw.

6. In a machine of the character described, a supporting bed, a reciprocating cross-head at one side of said supporting bed, supporting brackets carried by said cross-head at the side thereof adjacent the supporting bed and hinged supports carried by said outstanding brackets and operating above the supporting bed.

7. In a machine of the character de scribed, a supporting bed, a reciprocating carriage and a plurality of independently operable supports hinged to said carriage at different pointslongitudinally thereof and adapted to be independently swung from an operative position above the supporting bed into an inoperative position free of the sup porting bed.

8. In a machine of the character described, a supporting bed, a reciprocating carriage, a supporting bracket'outstanding from said carriage, a support hinged to the outer end of said bracket, a clamp bar pivoted on the upper side of said bracket, a track on the upper face of said bracket arranged to be engaged by the inner end of said clamp bar, and a clamping screw on the outer end of said clamp bar arranged to bear on top of the hinged support.

9. In a machine of the character de- Gopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Washington, D. O.

scribed, a supporting bed, a reciprocating carriage, a supporting bracket outstanding from said carriage, a support hinged to the outer end of said bracket, a clamp bar pivoted on the upper side of said bracket, a track on the upper face ofsaid bracket arranged to be engaged by the inner end of said clamp bar, a clamping screw on the outer end of said clamp bar arranged to bear on top of the hinged support, and a holder secured to the under face of said hinged support and laterally adjustable thereon.

10. In a machine of the character described, a bed, supporting screws at opposite ends of said bed, nuts engaging said supporting screws, Worm gears for operating said nuts, a shaft, Worms on said shaft engaging said worm gears, means for rotating said worm shaft, stone holding clamps carried by said bed, a reciprocating carriage and abrasive holding means carried by said reciprocating carriage in cooperating relation with the holding means on the bed.

11. In a machine of the character described, spaced apart parallel guideways,

parallel connected cross-heads sliding in said guide-Ways, means engaging said crossheads between the same for reciprocating the same, holding means carried by said carriage, a supporting bed and holding means carried by said supporting bed in cooperating relation to the holding means upon the carriage.

12. In a machine of the character described, parallel cross-heads, spacingbolts securing said cross-heads in spaced relation, guides for said cross-heads, outstanding brackets carried by one of said cross-heads and disposed substantially in the planes of the spacing bolts, holders carried by said brackets, a supporting bed and holding means carried by said supporting bed.

13. In a machine of the character set forth, a vertically movable support, a laterally adjustable stone bed mounted on said support, means for shifting said stone bed laterally and means for shifting the supporting bed vertically, a reciprocating carriage, an outstanding bracket on said carriage, an abrasive support hingedly mounted on said bracket in position above the laterally adjustable stone bed, and means for holding said hinged abrasive support in engagement with the stone on the stone bed.

GEORGE E. SHIPW AY.

Patents, 

